Bras d'Or Lake

Bras d'Or Lake is an irregular estuary in the centre of Cape Breton Island in Nova Scotia, Canada.[2] It has a connection to the open sea, and is tidal. It also has inflows of fresh water from rivers, making the brackish water a very productive natural habitat. It was designated the Bras d'Or Lake Biosphere Reserve by UNESCO in 2011.[3]

Bras d'Or Lake
Bras d'Or Lake is located in Nova Scotia
Bras d'Or Lake
Bras d'Or Lake
LocationCape Breton Island, Nova Scotia
Coordinates45°51′37″N 60°46′44″W / 45.86028°N 60.77889°W / 45.86028; -60.77889Coordinates: 45°51′37″N 60°46′44″W / 45.86028°N 60.77889°W / 45.86028; -60.77889
Primary outflowsGulf of St. Lawrence
Atlantic Ocean
Basin countriesCanada
Max. length100 kilometres (62 mi)
Max. width50 kilometres (31 mi)
Surface area1,099 km2 (424 sq mi)
Max. depth287 m (942 ft)
Water volume32,000,000,000 m3 (4.2×1010 cu yd)[1]
Shore length11,000 kilometres (621 mi) (excluding islands)[1]
Surface elevation0 metres (0 ft) (sea level)
1 Shore length is not a well-defined measure.


Pronounced (/brəˈdɔːr/ brə-DOR[4] or /bræˈdɔːr/ brad-OR),[5] maps before 1872 name it Le Lac de Labrador (or more simply Labrador).[6][7] Labrador was the name given by the Portuguese to much of eastern Canada. It meant farm, and is cognate with laborer.[8] An error of folk etymology, the name is spelt to resemble the French language Arm of Gold, a homonym. It is also called locally The Bras d'Or Lakes.


Bras d'Or Lake

The lake has a surface area of 1099 square kilometers.[9] Three arms stretch out to the north east. At the top, the Great Bras d'Or Channel connects to the ocean via a navigable channel. The maximum depth is 287 metres (942 ft) in the East Bay. It sits in 3,500 square kilometer drainage basin.[10]

The western side is generally shallow,[11] and is part of an extensive drumlin field. Steep hills rise abruptly on the northwestern side, to the Cape Breton Highlands.[12]

The Denys, Middle, Baddeck, and Georges Rivers all empty into the lake. The lake water has lower salinity than the surrounding ocean, and varies from about 20 parts per thousand near river mouths to 29 parts per thousand in deeper areas.[11]

Ice cover has been declining in recent years.[13]

The lake is connected to the North Atlantic by two natural channels; the Great and Little Bras d'Or Channels which pass on either side of Boularderie Island.[14] The southern tip of the lake is connected to the Atlantic Ocean via the St. Peters Canal, built for shipping traffic in the 1860s.

The restricted channels to the ocean cause a reduction in tidal range.[11]

Seaweed populations resemble those found in the Gulf of St. Lawrence. The warm waters are suitable for eastern oyster. Fish species include the blackspotted stickleback, white hake, blueback herring, Greenland cod, and introduced rainbow trout. These feed double-crested cormorants, bald eagles, and great blue herons.[11]

Human historyEdit

The Mi'kmaq were the first inhabitants following the end of the last ice age. They called it Pitupaq, meaning long salt water. A French trading post was built in 1650.[9] Alexander Graham Bell built an estate Beinn Bhreagh where he established a research laboratory, and used the lake to test man-carrying kites, airplanes and hydrofoil boats.

Most of the shore is undeveloped, but settlements include Baddeck, Eskasoni, Little Bras d'Or, St. Peter's, and Whycocomagh. Shoreline is under the jurisdiction of the Cape Breton Regional Municipality and the county municipalities of Inverness, Victoria, and Richmond.

Sailboat racing is a long tradition in the Bras d'Or, with events hosted by the Bras d'Or Yacht Club[15]

Today most economic activity around the lake is related to the services in the tertiary sector of the economy.[3]

See alsoEdit



  1. ^ a b "Canadian Technical Report of Hydrography and Ocean Sciences 230 – Modelling the tides of the Bras d'Or Lakes" (PDF). Department of Fisheries and Oceans – 2003.
  2. ^ Chisholm, Hugh, ed. (1911). "Bras d'Or" . Encyclopædia Britannica (11th ed.). Cambridge University Press.
  3. ^ a b "UNESCO Biosphere". UNESCO.
  4. ^ The Canadian Press (2017), The Canadian Press Stylebook (18th ed.), Toronto: The Canadian Press
  5. ^ "Bras d'Or Lake". Merriam-Webster Dictionary.
  6. ^ "Carte du Canada ou de la Nouvelle France et des decouvertes que y ont ete faites. Dressee sur plusieurs observations et sur un grand nombre de relations imprimees ou manuscrites. Par Guillaume Del'Isle, Geographe de l'Academie Royale des Sciences. A Paris – David Rumsey Historical Map Collection (includes map)". Guillaume DeLisle, Quai de l'Horloge a l'Aigle d'Or, Paris, 1708. Retrieved 24 April 2012.
  7. ^ "A Chart of the Gulf of St. Laurence, Composed From A Great Number of Actual Surveys – David Rumsey Historical Map Collection (includes map)". Sayer and Bennett, London, 1708. Retrieved 24 April 2012.
  8. ^ "Bras d'Or Lake (C. B.)". Place-names of the province of Nova Scotia by Thomas J. Brown. Royal Print & Litho. in Halifax, N.S. 1922.
  9. ^ a b Francis, Daniel (2014). "Bras d'Or Lake". The Canadian Encyclopedia. Retrieved 1 August 2021.
  10. ^ "The Bras d'Or Lakes". Bras d'Or Lakes CEPI. Retrieved 1 August 2021.
  11. ^ a b c d "Bras d'Or Lake". Nova Scotia Museum of Natural History. 28 January 2006. Retrieved 1 August 2021.
  12. ^ "Bras d'Or Lake". United Nations Educational, Scientific and Cultural Organization. Retrieved 1 August 2021.
  13. ^ "Historical Total Accumulated Ice Coverage" (PDF). Environment Canada. Retrieved 1 August 2021.
  14. ^ "Bras d'Or Lake". Encyclopedia Britannica. Retrieved 1 August 2021.
  15. ^ "Archived copy" (PDF). Archived from the original (PDF) on 4 March 2016. Retrieved 22 November 2015.CS1 maint: archived copy as title (link)

External linksEdit

"Cruisers' guide to the Brad d'Or Lakes and Coastal Harbours"